Technical Manual
PD4-N5918
Connections and circuits
20
Issue: V 1.4
Setting the RS485/CANopen module address
Max. 127 addresses can be set which can, however, only be used to the full extent via
CANopen as the maximum number of PD4-N controllers in an RS485 network is
limited to 32 by the hardware.
A rotary switch on the board can be used to adjust the module addresses 1 to 7 in the
hardware.
With RS485, the baud rate is read out from the EEPROM. Depending on the position
of the rotary switch, it is either set for 1 MBaud (CANopen) or is read out from the
EEPROM; see table:
Rotary switch value
dec
(hex)
Node ID
Baud rate
0
(0x00)
From EEPROM
1 - 7
(0x01 - 0x07)
= rotary switch value
= from EEPROM
(RS485)
or 1 MBaud (CANopen)
8
(0x08)
From EEPROM
9 - 15
(0x09 - 0x0F)
= rotary switch value
minus 8
From EEPROM
If the rotary switch is in position 0 or 8, the module address can be set in the software
and read out from the EEPROM.
When the power supply is applied, the controller checks which address is set with the
rotary switch on the hardware. This hardware address is then adopted. After the
address is changed, the power supply must be briefly switched off and on again.
